It is likely to contain information of a speculative nature, but such speculation is usually sourced from the automotive news media, the automaker's media press releases, or other news sources. Concept cars, or similar evolutionary vehicles based on them, may never see production. The content and specifications for those selected for continuation may change significantly as the concept evolves, or as production nears if it is launched, and as more information becomes available. Concept automobiles, and their derivatives if any, are subject to delays or cancellation by the automaker.